diff options
Diffstat (limited to 'tools/external/asm/org/objectweb/asm/tree/analysis/DataflowValue.java')
-rw-r--r-- | tools/external/asm/org/objectweb/asm/tree/analysis/DataflowValue.java | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/tools/external/asm/org/objectweb/asm/tree/analysis/DataflowValue.java b/tools/external/asm/org/objectweb/asm/tree/analysis/DataflowValue.java new file mode 100644 index 000000000..0019d7f2c --- /dev/null +++ b/tools/external/asm/org/objectweb/asm/tree/analysis/DataflowValue.java @@ -0,0 +1,92 @@ +/*** + * ASM: a very small and fast Java bytecode manipulation framework + * Copyright (c) 2000-2005 INRIA, France Telecom + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ +package org.objectweb.asm.tree.analysis; + +import java.util.Set; + +import org.objectweb.asm.tree.AbstractInsnNode; + +/** + * A {@link Value} that is represented by its type in a two types type system. + * This type system distinguishes the ONEWORD and TWOWORDS types. + * + * @author Eric Bruneton + */ +public class DataflowValue implements Value { + + /** + * The size of this value. + */ + public final int size; + + /** + * The instructions that can produce this value. For example, for the Java + * code below, the instructions that can produce the value of <tt>i</tt> + * at line 5 are the txo ISTORE instructions at line 1 and 3: + * + * <pre> + * 1: i = 0; + * 2: if (...) { + * 3: i = 1; + * 4: } + * 5: return i; + * </pre> + * + * This field is a set of {@link AbstractInsnNode} objects. + */ + public final Set insns; + + public DataflowValue(final int size) { + this(size, SmallSet.EMPTY_SET); + } + + public DataflowValue(final int size, final AbstractInsnNode insn) { + this.size = size; + this.insns = new SmallSet(insn, null); + } + + public DataflowValue(final int size, final Set insns) { + this.size = size; + this.insns = insns; + } + + public int getSize() { + return size; + } + + public boolean equals(final Object value) { + DataflowValue v = (DataflowValue) value; + return size == v.size && insns.equals(v.insns); + } + + public int hashCode() { + return insns.hashCode(); + } +} |